BOOM & BEARING AS 1807813 - Caterpillar

Remove guard (1) which protects nitrogen charging valve (2) .
Remove the protective cap on nitrogen charging valve (2) .
Illustration 6 g00282185
(3) Nipple. (4) Coupling assembly. (5) Pressure gauge. (6) Hose assembly. (7) Coupling assembly. (8) Nipple. (9) Valve. (10) Pressure gauge. (11) Regulator assembly. (12) Pressure regulating screw. (13) Chuck for the nitrogen cylinder valve. (14) Valve handle. (15) Nitrogen charging chuck. (16) Hose assembly. (17) Tee.
Identify the correct nitrogen charging chuck.Note: For a nitrogen charging valve with a .305 inch -32 THD, use a 1S-8938 Nitrogen Charging Chuck and a 1U-5551 Extension Assembly. For a nitrogen charging valve with a .482 inch -26 THD, use a 7S-5106 Nitrogen Charging Chuck and a 7S-5439 Extension Assembly .
Attach hose assembly (16) to nitrogen charging chuck (15) .
Turn the valve handle (14) on nitrogen charging chuck (15) all the way in the counterclockwise direction. This will ensure that nitrogen charging valve (2) will not be opened when nitrogen charging chuck (15) is attached to the nitrogen charging valve.
Attach nitrogen charging chuck (15) and hose assembly (16) to nitrogen charging valve (2) .
Place the open end of hose assembly (16) away from the work area and away from other personnel.
Turn valve handle (14) on nitrogen charging chuck (15) all the way in the clockwise direction in order to open nitrogen charging valve (2). This will release all of the compressed gas from the accumulator through hose assembly (16). Now, the accumulator can be removed from the machine.Nitrogen Charging Procedure
Table 1
Required Tools    
Part Number     Description     Qty    
175-5507     Nitrogen Charging Group     1    
7S-5439     Extension Assembly     1    
1U-5551     Valve Extension     1    
Move the machine to level ground.
Move the transmission control lever to the NEUTRAL position. Move the transmission neutral lock to the LOCKED position.
Engage the parking brake.
Start the engine. Keep the engine running during the following steps.
Move the lift control lever to the FLOAT position. Turn the ride control switch to the ON position.
Remove guard (1) which protects nitrogen charging valve (2) .
Remove the protective cap on nitrogen charging valve (2) .
Illustration 7 g00282185
(3) Nipple. (4) Coupling assembly. (5) Pressure gauge. (6) Hose assembly. (7) Coupling assembly. (8) Nipple. (9) Valve. (10) Pressure gauge. (11) Regulator assembly. (12) Pressure regulating screw. (13) Chuck for the nitrogen cylinder valve. (14) Valve handle. (15) Nitrogen charging chuck. (16) Hose assembly. (17) Tee.
Turn valve handle (14) on nitrogen charging chuck (15) all the way in the counterclockwise direction. Attach the appropriate nitrogen charging chuck (15) to nitrogen charging valve (2) .Note: For a nitrogen charging valve with a .305 inch -32 THD, use a 1S-8938 Nitrogen Charging Chuck and a 1U-5551 Extension Assembly. For a nitrogen charging valve with a .482 inch -26 THD, use a 7S-5106 Nitrogen Charging Chuck and a 7S-5439 Extension Assembly .
Attach hose assembly (16) between nitrogen charging chuck (15) and tee (17). Install needle valve (9) on one of the connecting points of the tee. Install